I can advise you can advise he can advise we can advise you can advise they can advise
V-ing form
I can be advising you can be advising he can be advising we can be advising you can be advising they can be advising
Perfect
I can have advised you can have advised he can have advised we can have advised you can have advised they can have advised
V-ing perfect
I can have been advising you can have been advising he can have been advising we can have been advising you can have been advising they can have been advising
Negation
Simple form
I can't advise you can't advise he can't advise we can't advise you can't advise they can't advise
V-ing form
I can't be advising you can't be advising he can't be advising we can't be advising you can't be advising they can't be advising
Perfect
I can't have advised you can't have advised he can't have advised we can't have advised you can't have advised they can't have advised
V-ing perfect
I can't have been advising you can't have been advising he can't have been advising we can't have been advising you can't have been advising they can't have been advising
Interrogative form
Simple form
can I advise? can you advise? can he advise? can we advise? can you advise? can they advise?
V-ing form
can I be advising? can you be advising? can he be advising? can we be advising? can you be advising? can they be advising?
Perfect
can I have advised? can you have advised? can he have advised? can we have advised? can you have advised? can they have advised?
V-ing perfect
can I have been advising? can you have been advising? can he have been advising? can we have been advising? can you have been advising? can they have been advising?
Interro-negative form
Simple form
can't I advise? can't you advise? can't he advise? can't we advise? can't you advise? can't they advise?
V-ing form
can't I be advising? can't you be advising? can't he be advising? can't we be advising? can't you be advising? can't they be advising?
Perfect
can't I have advised? can't you have advised? can't he have advised? can't we have advised? can't you have advised? can't they have advised?
V-ing perfect
can't I have been advising? can't you have been advising? can't he have been advising? can't we have been advising? can't you have been advising? can't they have been advising?